发明授权
US07388533B2 Multi-bit sigma-delta modulator and digital-to-analog converter with one digital-to-analog capacitor
有权
多位Σ-Δ调制器和具有一个数模转换器的数/模转换器
- 专利标题： Multi-bit sigma-delta modulator and digital-to-analog converter with one digital-to-analog capacitor
- 专利标题（中）： 多位Σ-Δ调制器和具有一个数模转换器的数/模转换器
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申请号： US11588455申请日： 2006-10-27
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公开(公告)号： US07388533B2公开(公告)日： 2008-06-17
- 发明人: Yi Gyeong Kim , Chong Ki Kwon , Jong Dae Kim , Min Hyung Cho , Seung Chul Lee , Gyu Hyun Kim
- 申请人： Yi Gyeong Kim , Chong Ki Kwon , Jong Dae Kim , Min Hyung Cho , Seung Chul Lee , Gyu Hyun Kim
- 申请人地址： KR Daejeon
- 专利权人： Electronics and Telecommunications Research Institute
- 当前专利权人： Electronics and Telecommunications Research Institute
- 当前专利权人地址： KR Daejeon
- 代理机构： Ladas & Parry LLP
- 优先权： KR10-2005-0118141 20051206; KR10-2006-0050320 20060605
- 主分类号： H03M1/82
- IPC分类号： H03M1/82 ; H03M3/00
摘要：
A digital-to-analog converter (DAC) for a sigma-delta modulator is provided. The DAC has a switched capacitor structure using an operational amplifier (OP amp) and performs a function exceeding 3-level using a switching method employing only one capacitor in single ended form. Thus, DAC non-linearity caused by capacitor mismatching does not occur, and the number of output levels of the DAC is increased. Also, the DAC capacitor may be applied to a general DAC to increase the ratio of DAC output levels to capacitors.
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